Induction (weeks 1-5): Patients receive vincristine IV on days 1, 8, and 15; oral prednisone three times daily on days 1-14; daunorubicin IV over 15 minutes on days 1, 8, 15, and 22; asparaginase intramuscularly (IM) on days 12, 15, 18, 22, 24, 27, 30, and 33; and methotrexate IT on day 1.